IPC Main Group
E04B 7/00 Roofs; Roof construction with regard to insulation
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- BUILDING
- Subclass:
- GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
Filing statistics
IPC E04B 7/00 belongs to the parent subclass E04B, which recorded 407,239 patent applications worldwide between 2013 and 2023. Annual filings grew from 16,759 in 2013 to 51,677 in 2023 (+208%), peaking at 57,449 applications in 2020. The most active applicants in class E04 are CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION (6,575 applications), ZHEJIANG YASHA DECORATION COMPANY (4,488 applications) and SGCC(STATE GRID CORPORATION OF CHINA) (4,427 applications).
Source: EPO PATSTAT, worldwide filings
Related Keywords
ROOF(S) structures of buildingsSPIRESSTEEPLES
7 direct subcodes
Child Classifications
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- E04B 7/02 with plane sloping surfaces, e.g. saddle roofs
- E04B 7/08 Vaulted roofs
- E04B 7/12 formed in bays, e.g. sawtooth roofs
- E04B 7/14 Suspended roofs
- E04B 7/16 Roof structures with movable roof parts
- E04B 7/18 Special structures in or on roofs, e.g. dormer windows
- E04B 7/2 Roofs consisting of self-supporting slabs, e.g. able to be loaded
Top Applicants
Top 10 applicants by patent filingsfor class E04, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION 6,575
- ZHEJIANG YASHA DECORATION COMPANY 4,488
- SGCC(STATE GRID CORPORATION OF CHINA) 4,427
- CHINA CONSTRUCTION SECOND ENGINEERING BUREAU 4,352
- CHINA MCC17 GROUP COMPANY 3,122
- GOLD MANTIS FINE DECORATION TECHNOLOGY (SUZHOU) COMPANY 2,605
- SHENYANG JIANZHU UNIVERSITY 2,420
- CHINA CONSTRUCTION SEVENTH ENGINEERING DIVISION COMPANY 2,284
- CHINA CONSTRUCTION FIFTH ENGINEERING DIVISION CORPORATION 2,008
- CHINA CONSTRUCTION FIRST BUILDING (GROUP) CORPORATION 1,967